281569145

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{1999}}^1$

素因数の和:2225

約数の個数: 32

約数和(自身を含む): 399168000

約数和(自身を除く): 117598855

約数列:

[1, 5, 11, 13, 55, 65, 143, 197, 715, 985, 1999, 2167, 2561, 9995, 10835, 12805, 21989, 25987, 28171, 109945, 129935, 140855, 285857, 393803, 1429285, 1969015, 4331833, 5119439, 21659165, 25597195, 56313829, 281569145]

約数ペア:

[(1, 281569145), (5, 56313829), (11, 25597195), (13, 21659165), (55, 5119439), (65, 4331833), (143, 1969015), (197, 1429285), (715, 393803), (985, 285857), (1999, 140855), (2167, 129935), (2561, 109945), (9995, 28171), (10835, 25987), (12805, 21989)]